/*
 * Copyright (c) 2024 Huawei Device Co., Ltd.
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * Base Class Animal
 *
 * @since 2024/5/8
 */
class Animal {
    /**
     * makeSound
     */
    public void makeSound() {
        System.out.println("The animal makes a sound.");
    }
}

/**
 * Subclass Dog
 *
 * @since 2024/5/8
 */
class Dog extends Animal {
    /**
     * makeSound
     */
    @Override
    public void makeSound() {
        System.out.println("The dog barks.");
    }
}

/**
 * Subclass Cat
 *
 * @since 2024/5/8
 */
class Cat extends Animal {
    /**
     * makeSound
     */
    @Override
    public void makeSound() {
        System.out.println("The cat meows.");
    }
}

/**
 * Polymorphism Test
 *
 * @since 2024/5/8
 */
public class PolymorphismTest {
    public static void main(String[] args) {
        // Create Animal references and test polymorphism
        Animal dog = new Dog();
        dog.makeSound(); // Calls Dog's makeSound method

        Animal cat = new Cat();
        cat.makeSound(); // Calls Cat's makeSound method
    }
}